Throttle-valve.



UNITED STATES PATENT OFFICE.

CHARLES H. FOX, OF CINCINNATI, OHIO, ASSIGNOR TO THE AHRENS FIRE ENGINECOMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

THROTTLE-VALVE.

Specification of Letters Patent.

Patented Nov. 7, 1905.

Application filed April 29, 1905. Serial. No. 257,969.

To all whom, it may concern.-

Be it known that I, CHARLES H. Fox, a citizen of the United States,residing at Cincinnati, Ohio, have invented a new and useful Improvementin Throttle-Valves, of which the following is a specification.

My invention relates to throttle-valves of the class adapted to use onsteam fire-engines or elsewhere; and the objects of my improvement areto provide independent means to operate the valve from either side ofthe engine, to provide supporting-brackets for the extended valve-stems,to provide two independent valve-seats in the same body and respectiveseat-disks therefor, to provide means whereby both valve-disks maybeclosed at the same time, and to provideasimple, compact, and durableconstruction and assemblage of parts consistent with utmost efliciency,durability, and facility of operation. These objects are attained in thefollowing described manner, as illustrated in the accompanying drawings,in which Figure 1 is a throttle-valve embodying my improvement appliedto a boiler and engine; Fig. 2, a plan with parts in diametricalsection; Fig. 3, a vertical diametrical section of the valve-body, andFigs. 4 and 5 details of construction.

In the drawings, 6 represents the supporting-frame, 7 the verticalboiler, 8 the vertical duplex-engine, 9 the steam-pipe, and 11 thethrottle-valve therein, all assembled in the ordinary manner.

The valve-body 12 is formed with inlet and outlet openings 13 and 14 atright angles to each other, drip-hole 15 and transverse partition 16,which contains steam-passage 17, and is formed with valve-seats 18 onits opposite sides. Bonnets 19, provided with packing-glands 20 andformed with collars 21, are clamped on opposite ends of the valve-bodyby means of thimbles 22. Valve-stems 23, each provided with a hand wheelor crank 24 and adjustably threaded with right hand threads in therespective bonnets, are extended in opposite directions from thevalve-body in registration with each other and with steam-passage l7 andsupported by means of brackets 25, secured to the boiler. Valvedisks 26and 27, swiveled on the inner ends of the valve-stems in the ordinarymanner on opposite sides of partition 16, register with the adjacentseats 18. Each valve disk and stem is formed with a transverse hole 28for the insertion of a pin to lock them together during the grinding ofthe seats, which is facilitated by loosening the thimbles 22sufliciently to permit the bonnets and stems to turn freely therein.

Nuts 31 and 32, formed on adjacent faces of the respective valve-disks,serve to hold them from turning while being secured to or removed fromthe corresponding valve-stems. Nut 31 is formed with a central recess 33to admit the smaller nut 32, that the disks may approach each other moreclosely and be seated at the same time.

In operation engineers are frequently required to perform some duty onthe opposite side of the engine from the throttle-valve and are delayedin reaching it to shut off the steam in emergencies. My improvementprovides for the independent control of the steam with equal facilityfrom either side of the engine by turning either hand-wheel in the samedirection, and permits the engineer more freedom of movement inperforming his duties and observing the operation of his enginewithoutincurring any danger of delay in shutting down in case ofemergency.

Having fully described my improvement, what I claim as my invention, anddesire to secure by Letters Patent of the United States,

1. A throttle-valve formed with a steampassage and provided with twovalve-disks mounted on the respective stems and movable independentlythereby in opposite directions to close the passage- 2. A throttle-valveformed with a circular passage and provided with valve-disks swiveled onrespective stems in registration with the passage and with each otherand on opposite sides of the passage, said disks being movableindependently withthe respective stems in opposite directions to closethe passage.

3. In a throttle-valve, abody formed with a partition having a circularpassage therethrough, valve-stems adjustably supported on opposite sidesof the partition in the axial line of the passage, and valve-disksswiveled on the respective stems and independently movable thereby inopposite directions to close the passage.

4. In a throttie-valve,ind ependently'adjust able valve-disks arrangedto close opposite ends of a steam-passage formed in an interposedpartition, said disks beingformed with nuts on their respective opposingfaces, one of said nuts being larger than the other and foamed with arecess, for the purpose specifie 5. In a throttle-valve, similarvalve-disks swiveled 0n stems and movable thereby to- Ward each otherand formed with nuts on their respective opposite faces, the one havinga central recess adapted to loosely inclose the other nut.

6. In athrottle-valve, the combination with a body, a partition having acircular passage, a stem adjustable toward one side of the partition anda Valve-disk thereon in registration tive stems.

CHARLES H. FOX. Witnesses:

GEO. W. KRAPP, ROBERT S. CARR.

